﻿using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Diagnostics;
using System.ServiceModel;
using System.Runtime.Serialization;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;


namespace DragDraw.Service
{
    public class WidgetSessionData : SqlDataManager
    {
        ///<summary>
        ///插入WidgetSession信息
        ///</summary>
        ///<exception cref="DataErrorException">数据库执行错误</exception>
        ///<exception cref="DataNotFoundException">查找不到相应记录</exception>
        static public bool Insert(int widgetID,string sessionName,string sessionValue)//what if the id exist?
        {
            SqlCommand curCommand;
            curCommand = new SqlCommand();
            curCommand.CommandType = CommandType.StoredProcedure;
            curCommand.CommandText = "InsertWidgetSession";
            curCommand.Parameters.Add("@result", SqlDbType.Int);
            curCommand.Parameters.Add("@widgetID", SqlDbType.Int);
            curCommand.Parameters.Add("@sessionName", SqlDbType.NVarChar,50);
            curCommand.Parameters.Add("@sessionValue", SqlDbType.Text);
            curCommand.Parameters["@result"].Direction = ParameterDirection.Output;
            curCommand.Parameters["@widgetID"].Value = widgetID;
            curCommand.Parameters["@sessionName"].Value = sessionName;
            curCommand.Parameters["@sessionValue"].Value = sessionValue;

            curCommand.Connection = SqlDataManager.OpenConnection();
            int result = 0;
            try
            {
                result = curCommand.ExecuteNonQuery();
            }
            catch (Exception error)
            {
                Console.WriteLine(error.Message);
                throw new DataErrorException("WidgetSessionData.Insert:执行SqlCommand的时候发生错误！", error);
            }
            finally
            {
                SqlDataManager.CloseConnection(curCommand.Connection);
            }
            if (Convert.ToInt32(curCommand.Parameters["@result"].Value) == 0)//有没有执行sql语句？
            {
                throw new DataErrorException("WidgetSessionData.Insert:没有执行sql语句！", null);
            }
            if (result <= 0)//执行的sql语句是否成功？
            {
                throw new DataErrorException("WidgetSessionData.Insert:执行了sql语句，可是sql语句没有影响任何一条记录！", null);
            }
            return true;
        }
        ///<summary>
        ///删除WidgetSession信息
        ///</summary>
        ///<exception cref="DataErrorException">数据库执行错误</exception>
        ///<exception cref="DataNotFoundException">查找不到相应记录</exception>
        static public bool Delete(int widgetID)
        {
            SqlCommand curCommand;
            curCommand = new SqlCommand();
            curCommand.CommandType = CommandType.StoredProcedure;
            curCommand.CommandText = "DeleteWidgetSession";
            curCommand.Parameters.Add("@result", SqlDbType.Int);
            curCommand.Parameters.Add("@widgetID", SqlDbType.Int);
            curCommand.Parameters["@result"].Direction = ParameterDirection.Output;
            curCommand.Parameters["@widgetID"].Value = widgetID;

            curCommand.Connection = SqlDataManager.OpenConnection();
            int result = 0;
            try
            {
                result = curCommand.ExecuteNonQuery();
            }
            catch (Exception error)
            {
                Console.WriteLine(error.Message);
                throw new DataErrorException("WidgetSessionData.Delete:执行SqlCommand的时候发生错误！", error);
            }
            finally
            {
                SqlDataManager.CloseConnection(curCommand.Connection);
            }
            if (Convert.ToInt32(curCommand.Parameters["@result"].Value) == 0)//有没有执行sql语句？
            {
                throw new DataInsertException("WidgetSessionData.Delete:没有执行sql语句！", null);
            }
            if (result <= 0)//执行的sql语句是否成功？
            {
                throw new DataErrorException("WidgetSessionData.Delete:执行了sql语句，可是sql语句没有影响任何一条记录！", null);
            }
            return true;
        }
        ///<summary>
        ///更新WidgetSession信息
        ///</summary>
        ///<exception cref="DataErrorException">数据库执行错误</exception>
        ///<exception cref="DataNotFoundException">查找不到相应记录</exception>
        static public bool Update(int widgetID, string sessionName, string sessionValue)
        {
            SqlCommand curCommand;
            curCommand = new SqlCommand();
            curCommand.CommandType = CommandType.StoredProcedure;
            curCommand.CommandText = "UpdateWidgetSession";
            curCommand.Parameters.Add("@result", SqlDbType.Int);
            curCommand.Parameters.Add("@widgetID", SqlDbType.Int);
            curCommand.Parameters.Add("@sessionName", SqlDbType.NVarChar, 50);
            curCommand.Parameters.Add("@sessionValue", SqlDbType.Text);
            curCommand.Parameters["@result"].Direction = ParameterDirection.Output;
            curCommand.Parameters["@widgetID"].Value = widgetID;
            curCommand.Parameters["@sessionName"].Value = sessionName;
            curCommand.Parameters["@sessionValue"].Value = sessionValue;

            curCommand.Connection = SqlDataManager.OpenConnection();
            int result = 0;
            try
            {
                result = curCommand.ExecuteNonQuery();
            }
            catch (Exception error)
            {
                Console.WriteLine(error.Message);
                throw new DataErrorException("WidgetSessionData.Update:执行SqlCommand的时候发生错误！", error);
            }
            finally
            {
                SqlDataManager.CloseConnection(curCommand.Connection);
            }
            if (Convert.ToInt32(curCommand.Parameters["@result"].Value) == 0)//有没有执行sql语句？
            {
                throw new DataErrorException("WidgetSessionData.Update:没有执行sql语句！", null);
            }
            if (result <= 0)//执行的sql语句是否成功？
            {
                throw new DataErrorException("WidgetSessionData.Update:执行了sql语句，可是sql语句没有影响任何一条记录！", null);
            }
            return true;
        }
        ///<summary>
        ///查询WidgetSession信息
        ///</summary>
        ///<exception cref="DataErrorException">数据库执行错误</exception>
        ///<exception cref="DataNotFoundException">查找不到相应记录</exception>
        static public string Query(int widgetID, string sessionName)//if does not exist,return null
        {
            string result_string = "";
            SqlCommand curCommand;
            curCommand = new SqlCommand();
            curCommand.CommandType = CommandType.Text;
            curCommand.CommandText = "select SessionValue from WidgetSession where WidgetID='" + widgetID.ToString()+"' and SessionName='"+ sessionName +"'";

            curCommand.Connection = SqlDataManager.OpenConnection();
            bool HasResult = false;
            try
            {
                SqlDataReader reader = curCommand.ExecuteReader(CommandBehavior.SingleRow);
                if (reader.HasRows)
                {
                    HasResult = true;
                    while (reader.Read())
                    {
                        result_string = reader.GetString(0);
                    }
                }
            }
            catch (Exception error)
            {
                Console.WriteLine(error.Message);
                throw new DataErrorException("WidgetSessionData.Query:执行SqlCommand的时候发生错误！", error);
            }
            finally
            {
                SqlDataManager.CloseConnection(curCommand.Connection);
            }
            if (!HasResult)
            {
                throw new DataNotFoundException("WidgetSessionData.Query:顺利执行完sql语句，可是没有找到匹配的记录！", null);
            }
            return result_string;
        }
        ///<summary>
        ///显示所有WidgetSession信息
        ///</summary>
        ///<exception cref="DataErrorException">数据库执行错误</exception>
        ///<exception cref="DataNotFoundException">查找不到相应记录</exception>
        static public void Show()
        {
            Console.WriteLine("-----WidgetSession Table-----------------");
            SqlCommand curCommand;
            curCommand = new SqlCommand();
            curCommand.CommandType = CommandType.Text;
            curCommand.CommandText = "select * from WidgetSession";
            curCommand.Connection = SqlDataManager.OpenConnection();
            try
            {
                SqlDataReader reader = curCommand.ExecuteReader(CommandBehavior.Default);
                while (reader.Read())
                {
                    Console.WriteLine("{0} {1} {2} {3}", reader.GetInt32(0), reader.GetInt32(1), reader.GetString(2), reader.GetString(3));
                }
            }
            catch (Exception error)
            {
                Console.WriteLine(error.Message);
                throw new DataErrorException("WidgetSessionData.Show:执行SqlCommand的时候发生错误！", error);
            }
            finally
            {
                SqlDataManager.CloseConnection(curCommand.Connection);
                Console.WriteLine("-------------------------------------");
            }
        }
    }
}